Bifin or Biffin: How To spell?
The word Bifin is misspelled against Biffin, a noun meaning "A baked apple pressed down into a flat, round cake; a dried apple."
Biffin has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Bi & in which should not be misspelled with single 'F'
Wrong Spelling:  Bi-f-in  Correct Spelling:  Bi-ff-in 
Find more wrongly spelled words of Biffin to spell it well.